JPS60108101A - Thin metallic sheet manufacturing equipment - Google Patents
Thin metallic sheet manufacturing equipmentInfo
- Publication number
- JPS60108101A JPS60108101A JP21402783A JP21402783A JPS60108101A JP S60108101 A JPS60108101 A JP S60108101A JP 21402783 A JP21402783 A JP 21402783A JP 21402783 A JP21402783 A JP 21402783A JP S60108101 A JPS60108101 A JP S60108101A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- hot rolling
- temperature
- coil
- thin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000005098 hot rolling Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 238000009749 continuous casting Methods 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000011810 insulating material Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 238000004804 winding Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔本発明の控術分野〕
本発明は、連続鋳造設備と熱間圧延設備とからなる金属
薄板製造装置に関する。％に、本発明は、版厚５〜３０
ｍｍの金属薄板の連続ａ１遺設備及び熱間圧延設備とか
らなる金属薄板製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a metal sheet manufacturing apparatus comprising continuous casting equipment and hot rolling equipment. %, the present invention has a plate thickness of 5 to 30
This invention relates to a metal sheet manufacturing apparatus consisting of continuous A1 equipment and hot rolling equipment for manufacturing thin metal sheets of mm.
金ＰＡ薄板の連続鋳造設備において版厚５〜６０ｔｎｍ
の金属薄板は未だ実際に生産されていない。Continuous casting equipment for gold PA thin plate with plate thickness of 5 to 60 tnm
This metal sheet has not yet been actually produced.
この板厚５〜３０膿の金Ｍ薄板を連続鋳造設備で製造す
る場合、この設備の鋳型で凝固した金属薄板は、高温で
ろって、多量の熱エネルギー’を有している。この熱エ
ネルギーを保熱し、次工程の熱延工程へ高温コイル全供
給するようにすれば、コイル加熱装置が省略でき、省エ
ネルギーが期待できる。When manufacturing this M thin gold plate with a thickness of 5 to 30 mm using continuous casting equipment, the thin metal plate solidified in the mold of this equipment is at a high temperature and has a large amount of thermal energy. If this thermal energy is retained and the entire high-temperature coil is supplied to the next hot rolling process, the coil heating device can be omitted and energy savings can be expected.
本発明は、上記の期待にそう金属薄板製造装置を提供す
ることを目的とする０゛特に一本発明は、生産速匿の異
る連続鋳造設備と熱間圧延設４．７お□。５、ヤ。い・
縞、１．３イ、ヵあツお□必要としない金属薄板製造装
置全提供することを目的とする。The present invention aims to provide a thin metal plate manufacturing apparatus that meets the above expectations.In particular, the present invention is directed to continuous casting equipment and hot rolling equipment with different production speeds. 5. Ya. stomach·
The purpose is to provide a complete metal sheet manufacturing equipment that does not require stripes, 1.3 A, or heat □.
〔本発明の構成］
そして、本発明は、上記目的を達成する手段として、金
属薄板の温度調節装置又は二次冷却装置とコイルボック
スとを設けた点にある。すなわち、本発明は、金属薄板
の連続鋳造設備と熱間圧延設備との間に金属薄板の温度
調節装置又は二次冷却装置とコイルボックスとを設けた
ことを特徴とする金属薄板製造装置である。[Configuration of the Present Invention] The present invention is provided with a thin metal plate temperature control device or secondary cooling device and a coil box as means for achieving the above object. That is, the present invention is a thin metal sheet manufacturing apparatus characterized in that a thin metal sheet temperature adjustment device or a secondary cooling device and a coil box are provided between continuous metal sheet casting equipment and hot rolling equipment. .
本発明において、コイルボックスは、連続鋳造設備から
得られる金属薄板め熱エネルギーを保熱し、篩温コイル
を熱延工程へ供給する為に設ケたものであり、また、こ
のコイルボックスによって、連続鋳造設備から得られる
金属薄板を篩部で巻き取ることによって急激な温度低下
を防ぎ加熱せずＶＣ熱間圧延ができるようにしたもので
ある。In the present invention, the coil box is installed to retain the thermal energy of the thin metal sheet obtained from the continuous casting equipment and to supply the sieve warm coil to the hot rolling process. By winding up the metal sheet obtained from the casting equipment in a sieve part, a rapid temperature drop is prevented and VC hot rolling can be performed without heating.
寸た、本発明において、”コイルボックスノ前に金属薄
板の温バ［調節装置又は二次冷却装置を設けるものであ
るが、これはコイルボックスで所定の温度で金属薄板全
巻き取るためでろ９、金属薄板の巻き取り温度を割引Ｉ
することにより、均一な製品品質が得られるようにする
ためである。In fact, in the present invention, a heating bar [adjustment device or secondary cooling device] for the thin metal plate is provided in front of the coil box, and this is for the purpose of completely winding the thin metal plate at a predetermined temperature in the coil box. , the winding temperature of the metal sheet is discounted I
This is to ensure uniform product quality.
なお、上記め温度調節装置は、金属薄板の板厚が比較的
薄い場合で、空冷によっても所定の巻＠１８！り温度以
下に冷えｉＬ＞ぎてしてう場合に用いられる。−万、上
記の二次冷却装置は金属薄板の板厚が比較的厚い場合で
、空冷では所定の巻き取り温度まで冷却できな−場合に
、積極的に冷却する目的で使用される。この二次冷却装
置の二次とは、モーールド鋳造（例えば、後述のベルト
キャスタ）を−次冷却とした場合、これに続く冷却装置
であるという意味である。In addition, the above-mentioned temperature control device is used when the thin metal plate is relatively thin, and the predetermined winding @ 18! is achieved by air cooling. It is used when the temperature is too low. - The above-mentioned secondary cooling device is used for the purpose of actively cooling a thin metal plate that is relatively thick and cannot be cooled to a predetermined winding temperature by air cooling. The term "secondary" in this secondary cooling device means a cooling device that follows when mold casting (for example, a belt caster to be described later) is used for secondary cooling.
以下、本発明の実施例をろけて、本発明をより詳細に説
明する。Hereinafter, the present invention will be explained in more detail by referring to examples of the present invention.
〔実施例１〕
第１図は、本発明の実施例である金属薄板製造装置の正
面図であり、第２１はその平面図でちる・図中、１は連
続鋳造設備であって、これは裏面が水冷された鋼板製水
冷ベルトから構成されている。そ時て、このベルトは製
造する金属薄板７の板厚に相当する隙間を介して水平に
並設（又は傾斜を持って並設〕され、図示されていない
駆動装置により矢印ａ１ ＋ ａ２方向へ同期的に回動
さ五るようになっている。金属薄板７の温度調節装置２
は断熱材と小容量の炉内加熱装置で構成されておムこの
装置の長さは調節可能形となっている。また、図中５は
熱間圧延機であって、リバーズタイプを示し、また、６
゜６′ハマンドレルタイプのラインを示す。[Example 1] Fig. 1 is a front view of a thin metal plate manufacturing apparatus which is an embodiment of the present invention, and No. 21 is a plan view thereof.In the figure, 1 is continuous casting equipment, which is It consists of a water-cooled steel belt with the back side water-cooled. At that time, these belts are arranged horizontally (or arranged side by side with an inclination) through a gap corresponding to the thickness of the thin metal plate 7 to be manufactured, and are moved in the direction of arrows a1 + a2 by a drive device (not shown). The temperature control device 2 of the thin metal plate 7 is designed to rotate synchronously.
It consists of a heat insulating material and a small-capacity furnace heating device, and the length of this device is adjustable. In addition, 5 in the figure is a hot rolling mill, indicating a reverse type, and 6
゜6' Shows a Hammandrel type line.
上記第１．２図の装置の作用を説明すると、金属薄板の
連続鋳造設備１で溶鋼を凝固し、金属薄板７を作る。金
属薄板７は連続鋳造設備１を出た所では１０００℃以上
の高温の状態にあり、これ全金属薄板の温度調節装置２
を通すことにより金属薄板７の急激な温度低下を防ぎ、
金属薄板７を高温の１＼コイルボツクス３へ導びく。To explain the operation of the apparatus shown in FIG. 1.2, molten steel is solidified in continuous metal sheet casting equipment 1 to produce metal sheet 7. The thin metal sheet 7 is at a high temperature of 1000°C or more when it leaves the continuous casting equipment 1, and the temperature control device 2 for all thin metal sheets
By passing through the metal plate 7, a rapid temperature drop of the thin metal plate 7 is prevented,
The metal thin plate 7 is guided to the high temperature 1\coil box 3.
なお、コイルボックス６で＠き取るときの金属薄板７の
温度は温度調節装置２の畏さ全調節することによって所
定の温度にできる。Incidentally, the temperature of the thin metal plate 7 when it is scraped off with the coil box 6 can be kept at a predetermined temperature by fully adjusting the temperature control device 2.
コイルボックス３で高温の状態で巻かれた金属薄板７は
、放熱面積が大幅に減少するために温度低下が少なく、
次工程の熱間圧延機５へ移し、加熱することなく熱間圧
延が可能となる。The thin metal plate 7 wound in a high temperature state in the coil box 3 has a significantly reduced heat dissipation area, so there is little temperature drop.
The product is transferred to the next step, hot rolling mill 5, and hot rolling can be performed without heating.
熱間圧延機５のラインへ送られた薄板金属７は複数回圧
延され所定厚さの熱間圧延鋼板が得られる。The thin metal sheet 7 sent to the line of the hot rolling mill 5 is rolled multiple times to obtain a hot rolled steel sheet with a predetermined thickness.
ライン６，６′は薄板金属７を往復圧延する際に巻きも
どし及び巻き取りに使用される。The lines 6, 6' are used for unwinding and winding the sheet metal 7 during reciprocating rolling.
〔実施例２〕
第３図は、本発明の他の実施例である金属薄板製造装置
の正面図であり、第４図はその正面図である。第３，４
図中、１は連続鋳造設備であって、この実施例では２ス
トランド連続鋳造設備の場合を示す。３はコイルボック
スでめり、４はコイルカーであって、コイル昇降装置、
台車及びレールで構成されている。５はダンデムタイプ
の熱間圧延機であり、６はマンドレルタイプのラインで
ある。８は二次冷却装置でろって、冷却流体（空気、気
水、水等）ｄ噴出装置を備えており、また、９は保熱炉
であって、断熱材と小容量の炉内加熱装置で構成されて
いる。[Embodiment 2] FIG. 3 is a front view of a thin metal plate manufacturing apparatus according to another embodiment of the present invention, and FIG. 4 is a front view thereof. 3rd, 4th
In the figure, 1 is continuous casting equipment, and this example shows the case of a two-strand continuous casting equipment. 3 is a coil box, 4 is a coil car, and a coil lifting device,
It consists of a trolley and rails. 5 is a dandem type hot rolling mill, and 6 is a mandrel type line. 8 is a secondary cooling device, which is equipped with a cooling fluid (air, steam, water, etc.) d jetting device, and 9 is a heat retention furnace, which includes a heat insulating material and a small-capacity in-furnace heating device. It consists of
この第５．４図、に示す実施例においては、２ストラン
ド連続鋳造設備の場合を示すものでらり、以下前記実施
例１と異なる点について説明すると、金属薄板７の温度
制御を二次冷却装置８で行ない、保熱炉９では金属薄板
７の温度の保熱のみを行なう。The embodiment shown in Fig. 5.4 shows the case of a two-strand continuous casting facility, and the following will explain the differences from the above-mentioned embodiment 1. The heat retention furnace 9 only retains the temperature of the thin metal plate 7.
各ストランド毎に設置されているコイルボックス３で巻
き取られた金属薄板７はコイルカー４で熱間圧延機５の
ラインへ搬送される。The metal thin plate 7 wound up in a coil box 3 installed for each strand is conveyed to a hot rolling mill 5 line by a coil car 4.
２ストランドから交互に供給烙れる金属薄板７はクンデ
ム熱間圧延機５で圧延され、コイン６で巻き取られる。The metal sheets 7 alternately supplied from two strands are rolled by a Kundem hot rolling mill 5 and wound up by a coin 6.
第５図は、本発明で使用するコイルボックスの具体例を
示す図であって、これは入ｔ１１］ガづド１０、曲げロ
ール１１、薄板弁え１２１．Φ１コイル受ケロール１３
、コイル成形ロール１４、反転機構１５、＋−２コイル
受はロール１６で構成されている。そして、これは前記
の実施例１及び実施例２におけるコイルボックス３とし
て使用できるものである。そして、前記両実施例におい
て、連鋳設備１のラインから熱間圧延機５のラインへの
コイルの移行はこのコイルボックスに設けられている反
転機構１５で行なわれる。すなわち、入側ガイド１０で
案内された薄板は曲げロール１１で所定の曲率を与えら
れ、＋１コイル受ケロール１３及びコイル成形ロール１
４上でコイル状に巻かれ、巻き終ったコイルは反転機構
１５で１ｌＩＩ２コイル受はロール１６に移し、次工程
へ巻きほどされる。FIG. 5 is a diagram showing a specific example of the coil box used in the present invention. Φ1 coil receiver Kerol 13
, a coil forming roll 14, a reversing mechanism 15, and a +-2 coil receiver are comprised of rolls 16. This can be used as the coil box 3 in the first and second embodiments described above. In both of the embodiments described above, the transfer of the coil from the line of the continuous casting equipment 1 to the line of the hot rolling mill 5 is performed by a reversing mechanism 15 provided in this coil box. That is, the thin plate guided by the entrance guide 10 is given a predetermined curvature by the bending roll 11, and then the +1 coil receiving roll 13 and the coil forming roll 1
The finished coil is transferred to a roll 16 by a reversing mechanism 15, and unwound to the next process.
本発明は、以上詳記したように、連鋳設備で生産された
金属薄板を高温の状態でコイルに巻き取ることによって
急激な温度低下を防ぎ、金属薄板を加熱することなく熱
間圧延機への供給を可能とし、省エネルギーが期待でき
る効果が生ずるものでめり、また、コイルボックスで巻
き取る金属薄板の巻き取り温度を制御することにより均
一な製品品質が得られる効果も生ずるものである。As described in detail above, the present invention prevents a sudden temperature drop by winding a metal sheet produced in a continuous casting facility into a coil at a high temperature, and transfers the metal sheet to a hot rolling mill without heating the metal sheet. This method is advantageous in that it enables the supply of energy and can be expected to save energy, and it also has the effect of achieving uniform product quality by controlling the winding temperature of the thin metal sheet wound in the coil box.
第１図は、本発明の実施例である金属薄板製造装置の正
面図でおり、第２図゛は第１図の平面図である。第３図
は本発明の他の実施例でおる金属薄板製造装置の正面図
であり、第４図は第３図の平面図である。第５図は、本
発明で使用するコイルボックスの具体例である６
１・・・連続鋳造設備 ２・・・温度調節装置３・・−
コイルボックス ４−・串コイルカー５・・・熱間圧延
機 ６．６′・・・コイラフ・・・金属薄板 ８・・・
二次冷却装置９・・・保熱炉 １０・・・入ｆ＋Ｉｌｉ
ガイド１１・・・曲げロール １２・・・Ｒ＠押え１３
・＃−す１コイル受はロール
１４・・・コイル尾形ロール
１５・・・反転憬稈
１６・彎・丑２コイル受（ハ）ロール
復代理人 内 １） 明
復代理人 萩 原 、り６−
○゛
第２図
斗
第４図FIG. 1 is a front view of a thin metal plate manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. FIG. 3 is a front view of a thin metal plate manufacturing apparatus according to another embodiment of the present invention, and FIG. 4 is a plan view of FIG. 3. FIG. 5 shows a specific example of the coil box used in the present invention. 6 1... Continuous casting equipment 2... Temperature control device 3...-
Coil box 4-・Skewer coil car 5...Hot rolling machine 6.6'...Coil rough...Metal thin plate 8...
Secondary cooling device 9... Heat retention furnace 10... Input f+Ili
Guide 11...Bending roll 12...R@presser foot 13
・#-1 Coil receiver is roll 14... Coil Ogata roll 15... Inverted kiln 16, Kei, Ox 2 coil receiver (c) Roll sub-agent 1) Meifuku agent Hagiwara, Ri 6 - ○゛Figure 2 Figure 4
Claims (1)
板の温度調節装置又は二次冷却装置とコイルボックスと
を設けたこと％ Ｑｕ徴とする金属薄板製造装＋１゜A thin metal sheet manufacturing equipment with a temperature control device or a secondary cooling device and a coil box installed between the continuous thin metal sheet production equipment and the hot rolling equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21402783A JPS60108101A (en) | 1983-11-16 | 1983-11-16 | Thin metallic sheet manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21402783A JPS60108101A (en) | 1983-11-16 | 1983-11-16 | Thin metallic sheet manufacturing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60108101A true JPS60108101A (en) | 1985-06-13 |
Family
ID=16649058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21402783A Pending JPS60108101A (en) | 1983-11-16 | 1983-11-16 | Thin metallic sheet manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60108101A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62137103A (en) * | 1985-12-12 | 1987-06-20 | Kawasaki Steel Corp | Production plant train for thin steel sheet |
| JPS62203601A (en) * | 1986-03-03 | 1987-09-08 | Kawasaki Steel Corp | Metal sheet manufacturing equipment |
| EP0226446A3 (en) * | 1985-12-12 | 1987-09-09 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
| EP0241919A3 (en) * | 1986-04-14 | 1988-08-31 | Hitachi, Ltd. | Method of and apparatus for effecting a thickness-reduction rolling of a hot thin plate material |
| JPS63295046A (en) * | 1987-05-26 | 1988-12-01 | Kawasaki Steel Corp | How to wind and unwind thin slabs |
-
1983
- 1983-11-16 JP JP21402783A patent/JPS60108101A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62137103A (en) * | 1985-12-12 | 1987-06-20 | Kawasaki Steel Corp | Production plant train for thin steel sheet |
| EP0226446A3 (en) * | 1985-12-12 | 1987-09-09 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
| AU574941B2 (en) * | 1985-12-12 | 1988-07-14 | Kawasaki Steel Corp. | Method of producing thin metal sheets |
| US4793401A (en) * | 1985-12-12 | 1988-12-27 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
| JPS62203601A (en) * | 1986-03-03 | 1987-09-08 | Kawasaki Steel Corp | Metal sheet manufacturing equipment |
| EP0241919A3 (en) * | 1986-04-14 | 1988-08-31 | Hitachi, Ltd. | Method of and apparatus for effecting a thickness-reduction rolling of a hot thin plate material |
| US4793168A (en) * | 1986-04-14 | 1988-12-27 | Hitachi, Ltd. | Method of and apparatus for effecting a thickness-reduction rolling of a hot thin plate material |
| JPS63295046A (en) * | 1987-05-26 | 1988-12-01 | Kawasaki Steel Corp | How to wind and unwind thin slabs |
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